Question

The Directive gain is ______ on input power to antenna and _____ on power due to ohmic losses.

(a) Independent, independent

(b) Dependent, independent

(c) Independent, dependent

(d) Dependent, dependent

This question was posed to me during an online interview.

My doubt stems from Directive Gain in chapter Antenna Parameters of Antennas

Answer 1

The correct option is (a) Independent, independent

The best explanation: Directive gain is the ratio of power density to the average power radiated. \(G_d = \frac{P_{d(\theta,\emptyset)}}{P_{avg}}\)

So, the Directive gain is independent on both input power to antenna and power due to ohmic losses.

Power gain is dependent on input power and ohmic losses to antenna.